# Michelle

Popular questions and responses by Michelle-
## Math

Ralph's age is currently 3 years more than twice joe's age. But 3 years ago, ralph was was 4 times as old as Joe was the . How old will joe be in 10 years?

*asked on July 10, 2015* -
## math

how many integers are their own multiplicative inverses? a. 0 b. 1 c. 2 d. 3 is it 2 or 3? because it could be 1, -1, and 0

*asked on July 23, 2018* -
## Calculus

Squares with sides of length x are cut out of each corner of a rectangular piece of cardboard measuring 3 ft by 4 ft. The resulting piece of cardboard is then folded into a box without a lid. Find the volume of the largest box that can be formed in this

*asked on November 5, 2015* -
## Technical writing

In order to have a complete sentence, you need a ________. Select one: a. subject, verb, and a complete thought b. subject and verb c. subject, verb, and a prepositional phrase d. subject, verb, and a dependent clause

*asked on February 16, 2017* -
## Physics

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1500 kg and was approaching at 9.00 m/s due south. The second car has a mass of 700 kg and was approaching at 15.0 m/s due west. (a) Calculate the final

*asked on June 26, 2014* -
## Stats

About 10% of the population of a large country is math phobic. If two people are randomly selected what is the probability both are math phobic? And hat is the probability that at least one is math phobic? Any way to do this on stat crunch?

*asked on October 11, 2015* -
## chemistry

Write the formula of the conjugate base for acid H3PO4 and what is the name of the base Write the formula of the conjugate base for acid H3O+ and what is the name of the base ..........and how can i tell how to get it? i am lost

*asked on June 10, 2010* -
## Technical writing

Identify the sentence that is punctuated correctly. Select one: a. My parents moved to West Virginia when they retired because the price of living is cheaper there. b. My parents moved to West Virginia, when they retired, because the price of living is

*asked on March 7, 2017* -
## Technical writing

Identify the sentence that is punctuated correctly. Select one: a. In December 2013 I visited my aunt for Christmas in Allentown, Pennsylvania, for the first time in 20 years. b. In December 2013, I visited my aunt for Christmas in Allentown, Pennsylvania

*asked on March 7, 2017* -
## Chemistry II

what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm? I got 4.41M, is this correct?

*asked on September 2, 2009* -
## College Physics

Can someone check my answers for two and help me with the third? 1) A mass m at the end of a spring of spring constant k is undergoing simple harmonic oscillations with amplitude A. Part (a) At what positive value of displacement x in terms of A is the

*asked on April 25, 2014* -
## chem

I am pretty confused on this. 1. Pick the appropriate solvent to dissolve A) Sodium Chloride (ionic) B) Sodium Nitrate (ionic) both have the choices of 1) water 2) acetone 3)ethanol 4)methanol 5)carbon tetrachloride 6)toluene 7)hexane

*asked on September 18, 2012* -
## Probability

Five cards are drawn from an ordinary deck without replacement. Find the probability of getting a. All red cards b. All diamonds c. All aces

*asked on April 29, 2011* -
## Physics

(a) Calculate the linear acceleration of a car, the 0.280 m radius tires of which have an angular acceleration of 15.0 rad/s2. Assume no slippage. (m/s2) (b) How many revolutions do the tires make in 2.50 s if they start from rest? (rev) (c) What is their

*asked on June 29, 2014* -
## physics help please!

The motion of a piston in an auto engine is simple harmonic. The piston travels back and forth over a distance of 23 cm, and the piston has a mass of 1.7 kg. 2515 rpm 23 cm max speed of the piston 30.28757 m/s What is the maximum force acting on the piston

*asked on December 6, 2012* -
## Physics

I already figured out the answers to some but I need help with two more. 1) A disk with an initial angular velocity ω0 = 4.5 rad/s experiences a constant angular acceleration of α = 7.5 rad/s2 for time t = 15 s. Please answer the following questions. ω0

*asked on April 2, 2014* -
## Physics

Question 2. 3 Consider a box that explodes into two pieces while moving with Fig. 9-24 a constant positive velocity along an x axis. If one piece, with mass : m1, ends up with positive velocity v1, then the second piece, with : mass m2, could end up with

*asked on April 1, 2013* -
## Townview

Elaine is painting a fence. She knows that she needs 1 gallon of paint for each 10 feet of fencing. The fencing will enclose a rectangular yard that is 3 yards long and 2 yards wide. How much paint does Elaine need? (Remember 3 feet = 1 yard)

*asked on May 14, 2015* -
## Technical writing

Which is the correct comparative form of easy? Select one: a. easiest b. more easy c. easier d. easyer C

*asked on March 3, 2017* -
## chemistry

What are the spectator ions in the following complete ionic equation: Ba2+(aq)+2I−(aq)+2Na+(aq)+SO2−4(aq)→BaSO4(s)+2I−(aq)+2Na+(aq). Thank you so much!!!

*asked on July 8, 2013* -
## Chemistry

If the solubility of Ag2CO3 is 1.3x10^-4 mol/L, what is its Ksp? (the answer is said to be 8.8x10^-12) Ag2CO3(s) -----> 2 Ag+ (ag) + CO3 2- Ksp= [Ag+]^2 [CO3^2-] = [1.3x10^-4]^2[1.3x10^-4] =2.197x10^-12 thats what I did, but I found that if you first

*asked on July 18, 2018* -
## Comm 100 college

The most important principle of language adaptation is to A.adapt the level of language to the situation and the audience. B.adapt to less formal and more colloquial so that all people will understand you. C.adapt to spoken and written substandard language

*asked on November 13, 2011* -
## chem

a solution is prepared with 3.26g kcl and water to make 25.0ml,of kcl,what is the %(m/V) of the kcl solution.

*asked on April 22, 2015* -
## Biology

In the following chemical reaction, what is carbon dioxide (CO2)? 12 H20 + 6 CO2 -> 1 glucose molecule + 6 O2

*asked on March 2, 2009* -
## statistics

Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than 70%

*asked on November 20, 2012* -
## Chemistry

Write an equation showing that calcium hydroxide acts as an Arrhenius base in water. **(I'm not sure where to start or how to go about this question)

*asked on April 21, 2013* -
## physics help!

A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle

*asked on April 10, 2014* -
## math

The ratio of Sylvia's age to Bob's age is 3 to 7. The ratio of Sylvia's age to Joe's is 4 to 9. The ratio of Bob's age to Joe's is: A. 28 to 27 B. 7 to 9 C. 27 to 18 D. 10 to 13

*asked on September 14, 2018* -
## Chemistry

Given that Ka for HIO is 3.2 × 10-11 at 25 °C, what is the value of Kb for IO– at 25 °C? Then, Given that Kb for C6H5NH2 is 1.7 × 10-9 at 25 °C, what is the value of Ka for C6H5NH3 at 25 °C? I don't know where to start? Do I need an ICE table?

*asked on March 30, 2015* -
## Precalculus

Please help...a computerized spin balance machine rotates a 25 inch diameter tire at 480 revolutions per minute. (a) find the road speed in miles per hour at which the tire is being balanced (b) at what rate should the spin balance machine be set so that

*asked on September 13, 2012* -
## Business Math

Shelley Katz deposited $30,000 in a savings account at 5% interest compounded semiannually. At the beginning of year 4, Shelley deposits an additional $80,000 at 5% interest compounded semiannually. At the end of 6 years, what is the balance in Shelley's

*asked on May 16, 2012* -
## french

why is it not la grande-mere but la grand-mere since it is feminine?

*asked on March 5, 2008* -
## Chem 130

How many tons of zinc can be obtained from 976 tons of zinc ore that is 78.0% zinc carbonate?

*asked on November 4, 2014* -
## Calculus

Find the area of the region enclosed between y = 2sin (x) and y = 2cos (x) from x = 0 to x = pi/4. Thanks for your help :)

*asked on October 27, 2011* -
## science - physics

A plane flies with a velocity of 52 m/s east through a12 m/s cross wind blowing the plane south. Find the magnitude and direction (relative to due east) of the resultant velocity at which it travels.

*asked on September 27, 2011* -
## Gr. 12 Data Management

Five different CD-Rom games: garble, trapster,zoom, bungie, and blast'em are offered as a promotion by SugrRush cereals. One game is randomly included ith each box of cereal. Determine the probability of getting all 5 games if 12 boxes are purcahsed.

*asked on February 16, 2008* -
## science

a)Calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4 loosly bonded to 3H2O. b)When heated to 220degrees C, BeC2O4loosly bonded to 3H2O(s) dehydrates completely as represented below: BeC2O4loosely bonded to

*asked on January 4, 2007* -
## communications

Which of the following are the qualities of effective interpersonal communication conversation skills? A.making introductions, relevance, tact,and sincerity B.relevance, tact, sincerity, and giving directions C.relevance, tact, courtesy and sincerity I

*asked on November 13, 2011* -
## Pre Albergra

The Pentagons ABCDE and PQRST are Similar: Find the length x of TP

*asked on November 16, 2014* -
## Chemistry

There are several technological applications for the transuranium elements (Z > 92). An important one is in smoke detectors, which can use the decay of a tiny amount of americium-241 to neptunium-237.What subatomic particle is emitted from that decay

*asked on March 1, 2013* -
## Chemistry

Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a sample of Radium-223 to decrease to 1.00% of its initial value?

*asked on March 1, 2013* -
## Science

What is the combustion reaction for Isopropyl Alcohol (C3H8O)?

*asked on May 31, 2010* -
## AP chem

A 0.345g sample of anhydrous BeC2O4, which contains an inert impurity, was dissolved in a sufficient water to produce 100ml of solution. A 20.0ml portion of the solution was titrated w/ KMnO4(aq). The balanced equation for the reaction that occurred is as

*asked on January 4, 2007* -
## statistics

the average amount of rain per year in Greenville is 49 inches. the standard deviation is 8 inches. find the probability that nest year greeville will receive the following amount of rainfall. assume the variable is normally distributed. a) At most 55

*asked on May 16, 2011* -
## physical science

. The maximum allowable resistance for an underwater cable is one hundredth of an ohm per metre. If the resistivity of cooper is 1.54 × 〖10〗^(-8) Ω m, find the least diameter of a copper cable that could be used (show work)

*asked on February 17, 2017* -
## statistics

Scores from a statistics exam are reported as deviation scores. Which of the following deviation scores indicates a higher position in the class distribution?

*asked on December 6, 2012* -
## chemistry

A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei. Magic # of protons: 2,8,20,28,50,82 Magic # of neutrons: 2,8,20,38,50,82,126, 184 Using general trends, predict the stability of

*asked on December 4, 2012* -
## chemistry

Consider the following overall reaction which is experimentally observed to be second order in AB and zero order in C: AB+C -> A+BC Determine whether the mechanism below is valid for this reaction AB+ AB -> AB(sub 2) + A slow AB(sub2) + C -> AB+BC fast

*asked on October 10, 2012* -
## chemistry

a 500ml sample of o2 gas at 24 degrees celsius was prepared by decomposing a 3% aqueous solution of hydrogen peroxide, in this presence of a small amount of manganese catalyst by the reaction 2H2O2>2H2O+O2. The oxygen thus prepared was collected by

*asked on April 16, 2012* -
## statistics

Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has normal ditribution, the mean and the median are not equal. d. The

*asked on May 8, 2010* -
## Math

The scale drawing of a soccer field mis 1 inch= 10 yards. The drawing of a soccer field is 12 inches by 7.5 inches. Find the dimensions of the actual soccer field in square feet.

*asked on August 13, 2016* -
## math

how can you find what each mark represents on a number line?

*asked on September 13, 2015* -
## Chemisty

The activity of a radioisotope is 3000 counts per minute at one time and 2736 counts per minute 48 hours later. What is the half-life of the radioisotope?? a) 831hr b)521hr c)361 hr d)1.44hr

*asked on May 14, 2015* -
## statistics

the weights of newborn babies are distributed normally, with the mean of approximately 115 oz and a standard deviation of 20 oz. if a newborn baby is selected at random. what is the probability that the baby weighs more than 95 oz?

*asked on September 18, 2014* -
## Algebra

Suppose a cost-benefit model is given by y=2771x/100-x, where y is the cost for removing x percent of a given pollutant. What percent of pollutant can be removed for $36,000? Round your answer to the nearest tenth of a percent?

*asked on June 9, 2014* -
## math

If a store owner buys a microwave for $200 and sells it for $275. What is the percent markup based on cost?

*asked on March 15, 2014* -
## science

scientists often use----to better see how something work? a) models b)data c) procedures d) hypothesis

*asked on April 20, 2012* -
## statistics

the average number of gallons of lemonade consumed by the football team during a game is 20, with a standard deviation of 3 gallons. assume the variable is normally distributed. when a game is played, find the probability of using a) Between 20 and 25

*asked on May 16, 2011* -
## statistics

A history class has 75 members. If there is a 12% absentee rate per class meeting, find the mean, variance, and atandard deviation of the number of students who will be absent from each class

*asked on May 16, 2011* -
## chemistry

how do I prepare 50% and 70% ethanol from 95% ethanol?

*asked on March 4, 2011* -
## electrical trade theory

GIVE 2 REASONS WHY MICA IS USED AS THE INSULATION BETWEEN THE SEGMENTS OF THE COMMUTATOR? it is cheap, easy to use, heat resistant, an effective insulator, vibration resistant...what is your thinking on this? THANX TEXT BOOK DON'T HAVE THAT ANSWER.

*asked on September 30, 2006* -
## Math

Six teaspoons of extract are mixed with 240 ml of oral suspension what is the final concentration of the suspension?

*asked on July 8, 2018* -
## physical science

The heating elements of an electric toaster is typically made of nichrome wire (an alloy of nickel and chromium). As current passes through the wires, the wires heat up, thus toasting the toast. Estimate the overall resistance of a heating element which is

*asked on February 17, 2017* -
## Chemistry

am I doing this equation correctly, please help. K3PO4(aq) + Ba(NO3)2(aq) my answer: 3K(NO3)2(aq) + 2Ba(PO4)3(s) Double displacement precipitation

*asked on April 4, 2015* -
## Speed'Distance'Time

Find out the distance covered when, speed is 960 km/hour and time is 1 hour 50 minutes.

*asked on March 19, 2013* -
## statistics

on the daily run of an express bus, the average number of passengers is 48. the standard deviation is 3. Assume the variable is normally distributed. find the probability that the bus will have. a) between 36 and 40 passengers b) fewer than 42 passengers

*asked on May 16, 2011* -
## physics

A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 40.0° with the vertical. Find the velocity of the rain

*asked on January 24, 2010* -
## Math

How many different three-digit numbers can be written using digits from the set of 1, 2, 3, 4,5 without any repeating digits?

*asked on December 21, 2009* -
## physical science

What length of German silver wire, diameter 0.050 cm, is needed to make a 28 Ωresistor, if the resistivity of German silver is 2.2 × 〖10〗^(-7) Ω m (show work)

*asked on February 17, 2017* -
## Chemistry

The bubble in the tip of the buret is not removed prior to performing the NaOH standardization. Will the reported concentration of the NaOH be greater than, less than, or equal to the true concentration of the NaOH if the bubble is flushed from the buret

*asked on April 4, 2015* -
## maths

a flagpole cast a shadow 18m long when the altitude of the sun is 54 degrees.what is the height of the flagpole

*asked on October 10, 2013* -
## College Chemistry

A sample of an iron alloy contains 92.1g Fe, 2.59g C, and 1.59g Cr. Calculate the percent by mass of each component present in the alloy sample.

*asked on April 16, 2012* -
## Economics

Say you are the manager of a perfectly competitive firm selling a product. Your business is making a loss because total revenue is less than total costs. What would you do--shut down or continue to operate? Use hypothetical numbers to explain. Information

*asked on November 9, 2011* -
## physics

Point A is at a potential of +250 V, and point B is at a potential of -150 V. An á-particle is a helium nucleus that contains two protons and two neutrons; the neutrons are electrically neutral. An á-particle starts from rest at A and accelerates toward

*asked on January 12, 2011* -
## Biology

Dr. Paul is blood type O. His father was blood type A and his mother was blood type B. What were the genotypes of his parents and what are the possible blood types and ratios expected for crosses involving these parental genotypes?

*asked on December 14, 2009* -
## math

In the xy-plane, line l passes through the origin and is perpendicular to the line 4x+y=k, where k is a constant. If the two lines intersect at the point (t,t+1), what is the value of t? I tried drawing a picture of the problem described above, but I don't

*asked on October 31, 2008* -
## pyhsical science

A wire of uniform cross-section has a resistance of R Ω. What would be the resistance of a similar wire, made of the same material, but twice as long and of twice the diameter?

*asked on February 17, 2017* -
## math

An arc AB of length 5cm is marked an a circle of radius 3cm. Find the area of the sector bounded by this arc and the radii from A and B.

*asked on March 15, 2015* -
## Chemistry

A 10.0 gram sample of a mixture of CH4 and C2H4 reacts with oxygen at 25°C and 1 atm to product carbon dioxide gas and liquid water. If the reaction produces 520 kJ of heat, what is the mass percentage of CH4 in the mixture? PLEASE HELP! I do not know

*asked on October 26, 2014* -
## Chem 130

A sample of oxygen gas is collected by displacement of water at 25°C and 1.11 atm total pressure. If the vapor pressure of water is 23.756 mm Hg at 25°C, what is the partial pressure of the oxygen gas in the sample?

*asked on May 5, 2014* -
## american government

is the public vulnerable to exploitation by powerful groups owing to their monoploy over information and why is the public vulnerable

*asked on July 9, 2012* -
## Chemistry

Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations for the precipitation reaction or reactions that occur.

*asked on April 29, 2011* -
## trigonometry

The minute hand of a clock is 8 inches long. How far does the tip of the minute hand move in 30 minutes? How far does it move in 20 minutes? For 30 min. I got 8pie inches. For 20 mins., I got (16pie/3)inches. but i don't know if these answers are correct.

*asked on May 1, 2007* -
## English

I have to write an essay on one of the two topics for "The Ladies' Paradise" by Emile Zola: #1 - How does the "struggle for survival(or existence)"(both forms are used in book) work in the first few chapters? OR #2 - How does Mouret "exploit" women to

*asked on October 6, 2006* -
## Reserach Statistics in CRJU

A data set has n=10 pairs of X and Y values. This data has SSx=10, SSy= 20 and SP=10. Compute the Pearson correlation and explain r=sp/√ssx ssy = 10/√10*20= 10/√200 Simplify 200 under radical= 200 as 10^2⋅2. √(〖10〗^2 )×2= 10/10√2 or

*asked on June 30, 2016* -
## Math

The surface area of a right cone is 55π cm squared. Find the radius if the slant height is 6cm.

*asked on May 23, 2016* -
## geometry

An artist wants to make alabaster pyramids using a block of alabaster with a volume of 576 cubic inches. She plans to make each pyramid with a square base area of 3 square inches and a height of 4 inches. At most, how many pyramids can the artist make from

*asked on June 19, 2015* -
## Chemistry

1. If an aqueous solution that is 0.15 M in HF has an osmotic pressure of 3.9 atm at 25oC, what is the percent ionization of HF at this concentration? 2. A mixture of 2 volatile liquids is said to be ideal if each component obeys Raoult’s Law: Pi=XiPio

*asked on February 4, 2015* -
## Fianace

A 10-year bond has a coupon rate of 7% anually and a principal payment of $1,000.00. Other similar bonds are paying 9% annually. To determine the value of this bond you must find the interest factors, IF. at: A. 9% for 10 periods B. 9% for 20 periods C.

*asked on October 30, 2013* -
## finance

Tangshan Mining is considering issuing long-term debt. The debt would have a 30 year maturity and a 12 percent coupon rate and make semiannual coupon payments. In order to sell the issue, the bonds must be underpriced at a discount of 2.5 percent of face

*asked on July 15, 2013* -
## physics

A liquid of density 1354 kg/m^3 ﬂows with speed 2.45 m/s into a pipe of diameter 0.29 m. The diameter of the pipe decreases to 0.05 m at its exit end. The exit end of the pipe is 7.82 m lower than the entrance of the pipe, and the pressure at the exit of

*asked on November 29, 2012* -
## chemistry

A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?

*asked on October 10, 2012* -
## algebra II

What is the simplified form of y^2 - y - 12 / y^2 + 8y + 15

*asked on March 14, 2012* -
## physics

A 42kg person on a merry-go-round is traveling in a circle with a radius of 2m at a speed of 5 m/s. It asked for the acceleration which I got a 12.5 m/s (second square) and it also asked for the net horizontal force which I got at 525 N but I couldn't

*asked on February 15, 2012* -
## Math

A merchant buys cloth at $1.60 per yard. At what price per yard should he list the cloth so that he may sell it at a discount of 20% from the list price and still make a profit of 20% of the SALE PRICE?

*asked on July 5, 2011* -
## Chemistry

how can i find out how many moles of oxygen are in 9.85g of (NH4)2CO3 ? i want to know what steps to take and in what order.. please help

*asked on June 24, 2011* -
## math

Joaquin makes $600 a week. A raise of $24 a week represents what % of his salary?

*asked on November 14, 2010* -
## College Organic Chemistry

Why are fractionating towers in a refinery always tall?

*asked on October 21, 2010* -
## Math

How many different ways can a teacher line up 5 students for lunch?

*asked on December 20, 2009* -
## geometry

A ladder leaning against a vertical wall makes a angle of 75degree with the ground. If the foot of the ladder is 4 feet from the base of the wall, would this ladder be long enough for you to retrieve the suction dart that your friend stuck 17ft up the

*asked on April 2, 2009*